Ok, thanks, I checked my code.
While typing here again, I realized that the effect was using the alpha channel, quite obvious, and that I was only changing the color of the bmap. After fixing it, all works well. Thanks for the suggestions, atlast I can do what I wanted. Now I feel a lot better, after I had to work overtime a few hours today

.
EDIT | Where can I get help on the "write tgas with cscript" code? I am getting this message: D3D error: D3DXERR_INVALIDDATA
I've realized that in the trial version I cannot change the save_dir, I think. Is this correct? When changing it the game starts up and goes into the menu, but as soon as I load my actual map the engine just exits completely, no errors, nothing.